The Feynman iε in string theory

Edward Witten

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Abstract: The Feynman iε is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically. (This article is based on a talk presented at the Zuminofest in Berkeley, California, May 2-4, 2013.)

Original languageEnglish (US)
Article number55
JournalJournal of High Energy Physics
Volume2015
Issue number4
DOIs
StatePublished - Apr 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

  • Bosonic Strings
  • Superstrings and Heterotic Strings

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